Table 1.
Comparison of general information between the two groups [,n(%)].
| General information | Control group (n = 60) | Study group (n = 60) | χ 2/t | P |
|---|---|---|---|---|
| Gender | ||||
| Male | 24(40.00) | 28(46.67) | 0.543 | 0.461 |
| Female | 36(60.00) | 32(53.33) | ||
| Average age (years) | 58.06 ± 4.56 | 58.11 ± 4.32 | 0.062 | 0.951 |
| Average BMI (kg/m2) | 23.54 ± 2.31 | 23.67 ± 2.43 | 0.300 | 0.764 |
| Duration of COPD (years) | 5.12 ± 0.78 | 5.17 ± 0.80 | 0.347 | 0.729 |
| Duration of respiratory failure (d) | 8.93 ± 1.12 | 9.11 ± 1.16 | 0.865 | 0.389 |
| Degree of dyspnea | ||||
| Moderate | 45(75.00) | 41(68.33) | 0.657 | 0.418 |
| Severe | 15(25.00) | 19(31.67) | ||
| Educational level | ||||
| Junior high school and below | 17(28.33) | 16(26.67) | 0.962 | 0.618 |
| Secondary and high school | 21(35.00) | 26(43.33) | ||
| College and above | 22(36.67) | 18(30.00) | ||
| Combined diabetes | 6(10.00) | 7(11.67) | 0.086 | 0.769 |
| Combined hypertension | 8(13.33) | 7(11.67) | 0.076 | 0.783 |
| Combined hyperlipidemia | 10(16.67) | 9(15.00) | 0.062 | 0.802 |
| APACHE II score (points) | 20.71 ± 2.31 | 20.89 ± 2.34 | 0.424 | 0.672 |